CN214221941U

CN214221941U - Gear transmission structure of gearbox of mini-tiller

Info

Publication number: CN214221941U
Application number: CN202120244906.3U
Authority: CN
Inventors: 王艺霖; 潘扬春; 兰庆均
Original assignee: Chongqing Shineray Agricultural Machinery Co Ltd
Current assignee: Chongqing Shineray Agricultural Machinery Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-09-17
Anticipated expiration: 2031-01-28

Abstract

The utility model relates to a gear transmission structure of a gearbox of a mini-tiller, wherein an engine of the gear transmission structure is connected with a walking gear shifting mechanism and a cutter gear shifting mechanism through a clutch, the clutch is in output transmission connection with a second shaft, the second shaft is in transmission connection with a three-shaft big gear, and a three-shaft duplicate gear is arranged on the third shaft in a synchronous rotating and axial sliding way; the traveling gear shifting mechanism comprises a three-shaft duplicate gear, a four-shaft, a five-shaft and a traveling shaft, wherein the four-shaft is provided with a gear matched with the three-shaft duplicate gear so as to realize neutral, low and high gears, the four-shaft is connected with the five-shaft, the five-shaft is connected with the traveling shaft, the five-shaft duplicate gear is rotatably sleeved on the five-shaft, and the five-shaft duplicate gear is respectively matched with the gear of the four-shaft and the three-shaft duplicate gear so as to realize reverse gears; the cutter gear shifting mechanism comprises a three-shaft large gear, and the three-shaft large gear is in transmission connection with eight shafts which are connected with a cutter shaft. The walking and cutter gear shifting mechanism is input through the three-shaft duplicate gear and the three-shaft big gear respectively, is a relatively independent system, is convenient to control, has compact gear transmission design, and is beneficial to reducing the volume of a gearbox.

Description

Gear transmission structure of gearbox of mini-tiller

Technical Field

The utility model belongs to the technical field of the transmission of machine is ploughed a little in mechanical engineering, concretely relates to plough quick-witted gearbox gear drive structure a little.

Background

The mini-tiller is a mechanized agricultural cultivator which drives the cultivator to rotate to perform operations such as soil turning and the like by a small gasoline engine or a diesel engine, and is more and more widely accepted for use because the mini-tiller has the advantages of light weight, small volume, simple structure and the like, and can solve the problem that large agricultural machinery cannot be applied in some scenes. The mini-tiller mainly comprises a frame, an engine arranged on the frame, and the engine outputs a traveling system connected with a traveling wheel and a tilling tool system with a tilling blade through a transmission device.

In the initially developed mini-tiller structure, gears arranged in a transmission device are mainly single-stage transmission, the transmission of power transmission is small, and the output rotating speed lacks a changeable space; the problem that different soil qualities can be matched with different traveling speed requirements to achieve better cultivation efficiency cannot be solved; the initial mini-tiller has the defects of insufficient power and difficulty in meeting the requirements of people for efficient use in different environments.

In order to solve the above problems, technicians have designed various transmission types of structures for mini-tillers, such as the structure disclosed in CN 202441827U, CN 203130942U, CN 211288625U, etc., but some problems still remain in use, mainly including: 1. the volume of a gearbox of the transmission speed change part is still larger, and the oil quantity injected into the gearbox is large; 2. the engine is connected with the clutch, the output of the clutch is usually connected with the speed change mechanism through the belt, the transmission loss is large, the belt is exposed, the muddy water is easy to seep and then slip, and the service life of the whole machine is influenced; 3. the low-speed and high-speed gear of the walking system are high in speed, and are not matched with the rotation of the tillage knife, so that the soil turning effect is influenced, and the advancing load is larger.

SUMMERY OF THE UTILITY MODEL

The above-mentioned not enough to prior art, the to-be-solved technical problem of the utility model is to provide a machine gearbox gear drive structure is ploughed a little of new design, wholly gains more excellent transmission process, and the structure is compacter in order to reduce the gearbox volume, guarantees the effect of the output transmission efficiency of engine.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the gear transmission structure of the gearbox of the mini-tiller comprises an engine, wherein the engine is connected with a walking gear shifting mechanism and a cutter gear shifting mechanism through a clutch output, the clutch output is connected with a second shaft, a second shaft pinion is synchronously arranged on the second shaft in a rotating mode, the second shaft is meshed with a three-shaft large gear which is synchronously arranged on the third shaft in a rotating mode through the second shaft pinion so as to be in transmission connection with the third shaft, a three-shaft duplicate gear is also synchronously arranged on the third shaft in a rotating mode, and the three-shaft duplicate gear can slide along the axial direction of the third shaft; the traveling gear shifting mechanism comprises a three-shaft duplex gear, four shafts, five shafts and a traveling shaft, the three-shaft duplex gear consists of a three-shaft duplex pinion and a three-shaft duplex gearwheel, the four shafts are synchronously and rotatably provided with a four-shaft gearwheel and a four-shaft pinion which are respectively matched with the three-shaft duplex pinion and the three-shaft duplex gearwheel, so that neutral gear, high-speed gear and low-speed gear can be respectively and correspondingly realized when the three-shaft duplex gear slides along the axial direction of three shafts, the four shafts are also synchronously and rotatably provided with four-shaft transmission pinions, the four shafts are meshed with a five-shaft gearwheel synchronously and rotatably arranged on the five shafts through the four-shaft transmission pinions to be in transmission connection with the five shafts, the five shafts are in transmission connection with the traveling shaft, the five shafts can also be rotatably sleeved with the five-shaft duplex gear, one gear of the five-shaft duplex gears is meshed with the four, so that reverse gear can be correspondingly realized when the three-shaft duplicate gear slides along the axial direction of the three shafts; the cutter gear shifting mechanism comprises a three-shaft large gear, the three shafts are meshed with eight transmission gears arranged on the eight shafts in a synchronous rotating mode through the three-shaft large gear to be in transmission connection with the eight shafts, and the eight shafts are in transmission connection with a cutter shaft.

Further perfecting the technical scheme, five shafts are synchronously rotatably provided with five shaft chain wheels and are connected with a walking shaft through the five shaft chain wheels and chain transmission; eight epaxial synchronous rotation are equipped with eight gear shifting gears and eight gear shifting gears can follow eight axial slip, eight gears through eight gear shifting gears along its axial slip with seven epaxial synchronous rotation be equipped with seven gears mesh come into gear and transmission connection seven, seven transmission connection cutter axles.

Furthermore, the four-axis large gear and the four-axis small gear are arranged adjacently in the axial direction, and the axial length of the three-axis duplicate gear is smaller than the axial distance between the four-axis large gear and the four-axis small gear; in the axial direction, the three-shaft duplex pinion and the four-shaft gearwheel correspond to the same end, the three-shaft duplex gearwheel and the four-shaft pinion correspond to the same end, the five-shaft duplex gearwheel consists of a five-shaft duplex pinion and a five-shaft duplex gearwheel, the five-shaft duplex pinion is meshed with the four-shaft pinion, and the five-shaft duplex gearwheel is positioned at one end of the four-shaft pinion, which is far away from the four-shaft gearwheel.

Further, a four-axis transfer pinion is located on an end of the four-axis bull gear facing away from the four-axis pinion, and a five-axis sprocket is located on the five axis and corresponds to a position between the four-axis bull gear and the four-axis pinion.

Further, an eight-shaft transmission gear is arranged on the eight shaft and corresponds to the position between the four-shaft bull gear and the four-shaft transmission pinion; the eight-shaft shift gear is located at an end of the eight-shaft transfer gear that faces away from the four-shaft transfer pinion.

Furthermore, the seven shafts are meshed with nine shafts of gears which are synchronously and rotatably arranged on the nine shafts through seven shafts of gears to be in transmission connection with the nine shafts, the nine shafts are meshed with ten shafts of gears which are synchronously and rotatably arranged on the ten shafts through nine shafts of gears to be in transmission connection with the ten shafts, and the ten shafts are also synchronously and rotatably provided with ten shaft chain wheels and are in transmission connection with the cutter shaft through ten shaft chain wheels and chains.

Furthermore, the three-shaft duplicate gear is correspondingly connected on three shafts through splines so as to realize synchronous rotation and axial sliding; eight shift gears are correspondingly connected to eight shafts through splines so as to realize synchronous rotation and axial sliding.

Furthermore, a walking chain wheel is synchronously arranged on the walking shaft in a rotating mode, and the five-shaft chain wheel is connected with the walking chain wheel through chain transmission; the cutter shaft is synchronously provided with a cutter chain wheel in a rotating way, and the ten-shaft chain wheel is connected with the cutter chain wheel through chain transmission.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a plough quick-witted gearbox gear drive structure a little, walking gear shifting mechanism and cutter gear shifting mechanism are respectively through triaxial duplicate gear and triaxial gear wheel connection input, are relatively independent system, the control of being convenient for.

2. The utility model discloses newly designed walking gear shifting mechanism's gear drive, combined appropriate drive ratio, had more excellent transmission process and effect to match with the output rotational speed of cutter, during the use, walking speed is good with cutter rotational speed suitability, can effectively guarantee the output transmission efficiency of engine.

3. The gear transmission part of the gear transmission structure of the gearbox of the mini-tiller is designed compactly, so that the size of the gearbox is greatly reduced; the two-section chain transmission of the traditional cutter part is improved into a one-section continuous gear transmission and one-section chain transmission mode, and the continuous gear transmission has better structural strength and higher reliability compared with the chain transmission; particularly, the continuous gear transmission structure is compact, the size of the corresponding gearbox part can be smaller, the inner wall of the corresponding gearbox part can be better fitted, the inner space is reduced, the oil quantity required to be injected is correspondingly reduced, and the use cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a transmission speed change structure of a micro-cultivator in a specific embodiment;

FIG. 2 is a schematic view of a gearbox gear drive portion of the mini-tiller transmission shifting structure of FIG. 1;

FIG. 3 is a schematic view of FIG. 2 from another perspective;

FIG. 4 is a schematic view of a travel speed change transmission portion of the transmission speed change structure of the micro-farming machine of FIG. 1;

FIG. 5 is a schematic view of a tool change transmission portion of the transmission change structure of the mini-tiller of FIG. 1;

wherein, the gear box 1, the engine 12, the clutch 13, the clutch arm 131, the output shaft 14, the small bevel gear 141,

a biaxial 2, a large bevel gear 21, a biaxial pinion gear 22,

three shafts 3, three shaft bull gears 31, three shaft duplicate gears 32, three shaft duplicate pinions 321, three shaft duplicate bull gears 322,

four shafts 4, four shaft pinions 41, four shaft bull gears 42, four shaft transfer pinions 43,

five shafts 5, five shafts big gears 51, five shafts chain wheels 52, five shafts duplex gears 53, five shafts duplex pinion gears 531, five shafts duplex big gears 532,

the traveling shaft 6, the traveling sprocket 61,

eight shafts 8, eight shaft transfer gears 81, eight shaft shift gears 82,

the seven shafts 7, the seven shaft gears 71,

the nine shafts 9, the nine shaft gears 91,

ten-shaft 10, ten-shaft gear 101, ten-shaft sprocket 102,

a cutter shaft 11 and a cutter chain wheel 111.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

For easy understanding the utility model discloses a plough quick-witted gearbox gear drive structure's utility a little, combine to use this gear drive structure's holistic machine transmission variable speed structure a little to carry out concrete introduction.

Referring to fig. 1 to 5, the transmission speed change structure of the mini-tiller according to the embodiment includes an engine 12, the engine 12 is connected to a traveling gear change mechanism and a cutter gear change mechanism through an output of a clutch 13, an output shaft 14 of the clutch 13 is connected to a secondary shaft 2 through a gear transmission, a secondary pinion 22 is arranged on the secondary shaft 2 in a synchronous rotating manner, the secondary shaft 2 is engaged with a three-shaft gearwheel 31 arranged on a three shaft 3 in a synchronous rotating manner through the secondary pinion 22 to be in a transmission connection with the three shaft 3, a three-shaft duplicate gear 32 is further arranged on the three shaft 3 in a synchronous rotating manner, and the three-shaft duplicate gear 32 can slide along an axial direction of the three shaft 3.

The traveling gear shifting mechanism comprises the three-shaft duplicate gear 32, a four-shaft 4, a five-shaft 5 and a traveling shaft 6, the three-shaft duplicate gear 32 is composed of a three-shaft duplicate pinion 321 and a three-shaft duplicate gear 322, the four-shaft 4 is synchronously rotated and provided with a four-shaft gear wheel 42 and a four-shaft pinion 41 which are respectively matched with the three-shaft duplicate pinion 321 and the three-shaft duplicate gear 322 so as to respectively realize neutral gear, high gear and low gear when the three-shaft duplicate gear 32 slides along the axial direction of the three shafts 3, the four-shaft 4 is also synchronously rotated and provided with a four-shaft transmission pinion 43, the four-shaft 4 is meshed with a five-shaft gear wheel 51 which is synchronously rotated and provided on the five shafts 5 through the four-shaft transmission pinion 43 so as to be in transmission connection with the five shafts 5, the five shafts 5 are also synchronously rotated and provided with a five-shaft chain wheel 52 and is connected with the traveling shaft 6 through the five-shaft chain wheel 52 and a chain transmission, in particular, the traveling shaft 6 is synchronously rotated and provided with a traveling chain wheel 61, the five-shaft chain wheel 52 is connected with a walking chain wheel 61 through chain transmission; five shafts 5 can also be rotatably sleeved with five shaft duplicate gears 53, one of the five shaft duplicate gears 53 is meshed with the four shaft small gear 41 or the four shaft big gear 42, and the other of the five shaft duplicate gears 53 is matched with the three shaft duplicate gear 32, so that reverse gear can also be correspondingly realized when the three shaft duplicate gear 32 slides along the axial direction of the three shafts 3.

The cutter gear shifting mechanism includes triaxial gear wheel 31, and triaxial 3 goes up the eight transmission gears 81 that synchronous rotation was equipped with through triaxial gear wheel 31 and eight 8 and meshes mutually with transmission connection eight 8, and it is equipped with eight gear shifting gears 82 just still synchronous rotation on eight 8 eight gear shifting gears 82 can follow eight 8 axial slip so that correspond respectively and realize neutral gear and put into gear, eight 8 through eight gear shifting gears 82 when following its axial slip with seven epaxial 7 seven gears meshes mutually that synchronous rotation was equipped with and put into gear and transmission connection seven 7, seven 7 transmission connection cutter axles 11.

The transmission speed change structure of the embodiment, the walking gear change mechanism and the cutter gear change mechanism are respectively connected and input through the three-shaft duplicate gear 32 and the three-shaft large gear 31, and are relatively independent systems and convenient to control.

The gear transmission of the walking gear shifting mechanism is newly designed, a proper transmission ratio is combined, a better transmission process and effect are achieved, the gear transmission is matched with the output rotating speed of the cutter, the walking speed and the cutter rotating speed are good in adaptability during use, and the output transmission efficiency of the engine 12 can be effectively guaranteed.

Wherein, the output shaft 14 of the clutch 13 is provided with a small bevel gear 141 in synchronous rotation, and the output shaft 14 of the clutch 13 is meshed with a large bevel gear 21 arranged in synchronous rotation on the secondary shaft 2 through the small bevel gear 141 to be connected with the secondary shaft 2 in a transmission way.

Like this, the output shaft 14 of clutch 13 directly links the output to biax 2 through the gear, avoids the output loss that traditional belt feeder exists, does not use the belt nor does not have and exposes, and the output shaft 14 and the bevel pinion 141 of clutch 13 all can stretch into gearbox 1, and the leakproofness is good, avoids the infiltration, increase of service life.

The four-axis bull gear 42 and the four-axis pinion 41 are axially arranged adjacently, and the axial length of the three-axis duplicate gear 32 is smaller than the axial distance between the four-axis bull gear 42 and the four-axis pinion 41; in the axial direction, the three-axis duplex pinion 321 and the four-axis bull gear 42 correspond to the same end, the three-axis duplex bull gear 322 and the four-axis pinion 41 correspond to the same end, the three-axis duplex gear 32 slides in the axial direction of the three axes 3, the three-axis duplex pinion 321 is correspondingly a low gear when meshed with the four-axis bull gear 42, the three-axis duplex gear 32 slides in the axial direction of the three axes 3, the three-axis duplex pinion 322 is correspondingly a high gear when meshed with the four-axis pinion 41, the five-axis duplex gear 53 is composed of a five-axis duplex pinion 531 and a five-axis duplex bull gear 532, the five-axis duplex pinion 531 is meshed with the four-axis pinion 41, and the five-axis duplex pinion 532 is located at one end of the four-axis pinion 41 away from the four-axis bull gear 42, so that the three-axis duplex pinion 322 is meshed with the five-axis duplex pinion 532 when the three-axis duplex gear 32 slides in the axial direction of the three axes 3, and the five-axis duplex pinion 532 is correspondingly a reverse gear; the three-shaft duplicate gear 32 slides along the axial direction of the three shafts 3, and the neutral gear is corresponding to the three-shaft 3 duplicate big gear when the three-shaft 3 duplicate big gear is positioned between the four-shaft small gear 41 and the five-shaft duplicate big gear 532.

Wherein the four-axis transfer pinion 43 is located at an end of the four-axis bull gear 42 facing away from the four-axis pinion 41, and the five-axis sprocket 52 is located on the five axis 5 and corresponds between the four-axis bull gear 42 and the four-axis pinion 41.

Among them, the eight-shaft transmission gear 81 is on the eight shaft 8 and corresponds to the position between the four-shaft bull gear 42 and the four-shaft transmission pinion gear 43; the eight-shaft shift gear 82 is located at an end of the eight-shaft transmission gear 81 facing away from the four-shaft transmission pinion 43.

Therefore, the realizability of transmission is ensured, the structure is compact, and the reduction of the volume of the gearbox 1 is facilitated.

The seven shafts 7 are meshed with nine shafts 91 which are arranged on the nine shafts 9 in a synchronous rotating mode through seven shafts, so that the nine shafts 9 are connected in a transmission mode, the nine shafts 9 are meshed with ten shafts 101 which are arranged on the ten shafts 10 in a synchronous rotating mode through the nine shafts 91, so that the ten shafts 10 are connected in a transmission mode, ten shaft chain wheels 102 are further arranged on the ten shafts 10 in a synchronous rotating mode, the tool shafts 11 are connected with the tool shafts 11 through the ten shaft chain wheels 102 and a chain transmission mode, specifically, tool chain wheels 111 are arranged on the tool shafts 11 in a synchronous rotating mode, and the ten shaft chain wheels 102 are connected with the tool chain wheels 111 through the chain transmission mode.

Therefore, the traditional two-segment chain transmission is improved into a one-segment continuous gear transmission and one-segment chain transmission mode, and the continuous gear transmission has better structural strength and higher reliability compared with the chain transmission; particularly, the continuous gear transmission structure is compact, the size of the corresponding part of the gearbox 1 can be smaller, the inner wall of the corresponding part of the gearbox 1 can be better attached, the inner space is reduced, the oil quantity required to be injected is correspondingly reduced, and the use cost is reduced.

The three-shaft duplicate gear 32 is correspondingly connected to the three shafts 3 through splines so as to realize synchronous rotation and axial sliding; the eight-shaft shift gear 82 is correspondingly connected to the eight shafts 8 through splines to realize synchronous rotation and axial sliding. The synchronous rotary connection of other gears and chain wheels with corresponding shafts can also be selected to be connected by a spline or a flat key.

With reference to fig. 1 and fig. 2, the traveling shift mechanism and the cutter shift mechanism are both disposed in the transmission case 1, the transmission case 1 is further provided with a traveling shift shaft hole and a cutter shift shaft hole and is slidably connected to the traveling shift shaft 18 and the cutter shift shaft 19, the traveling shift shaft 18 is provided with a traveling shift fork corresponding to the three-shaft dual gear 32, and the cutter shift shaft 19 is provided with a cutter shift fork corresponding to the eight-shaft shift gear 82. The gearbox 1 is also provided with a through hole and is rotatably provided with a clutch arm 131, the clutch arm 131 is provided with a clutch cable in the gearbox 1 to control the clutch 13 to be opened and closed.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. Plough quick-witted gearbox gear drive structure a little, including the engine, the engine passes through clutch output connection walking gearshift and cutter gearshift, its characterized in that: the output of the clutch is connected with a second shaft, a second shaft pinion is synchronously and rotatably arranged on the second shaft, the second shaft is meshed with a three-shaft gearwheel synchronously and rotatably arranged on the third shaft through the second shaft pinion to be in transmission connection with the third shaft, a three-shaft duplicate gear is also synchronously and rotatably arranged on the third shaft, and the three-shaft duplicate gear can slide along the axial direction of the third shaft;

the traveling gear shifting mechanism comprises a three-shaft duplex gear, four shafts, five shafts and a traveling shaft, the three-shaft duplex gear consists of a three-shaft duplex pinion and a three-shaft duplex gearwheel, the four shafts are synchronously and rotatably provided with a four-shaft gearwheel and a four-shaft pinion which are respectively matched with the three-shaft duplex pinion and the three-shaft duplex gearwheel, so that neutral gear, high-speed gear and low-speed gear can be respectively and correspondingly realized when the three-shaft duplex gear slides along the axial direction of three shafts, the four shafts are also synchronously and rotatably provided with four-shaft transmission pinions, the four shafts are meshed with a five-shaft gearwheel synchronously and rotatably arranged on the five shafts through the four-shaft transmission pinions to be in transmission connection with the five shafts, the five shafts are in transmission connection with the traveling shaft, the five shafts can also be rotatably sleeved with the five-shaft duplex gear, one gear of the five-shaft duplex gears is meshed with the four-shaft pinion or the four-shaft gearwheel, and the other gear of the five-shaft duplex gears is matched with the three-shaft duplex gears, so that reverse gear can be correspondingly realized when the three-shaft duplicate gear slides along the axial direction of the three shafts;

the cutter gear shifting mechanism comprises a three-shaft large gear, the three shafts are meshed with eight transmission gears arranged on the eight shafts in a synchronous rotating mode through the three-shaft large gear to be in transmission connection with the eight shafts, and the eight shafts are in transmission connection with a cutter shaft.

2. The gear transmission structure of the gearbox of the mini-tiller according to claim 1, characterized in that: a five-axis chain wheel is synchronously arranged on the five axes in a rotating way and is connected with the walking shaft through the five-axis chain wheel and a chain transmission;

eight epaxial synchronous rotation are equipped with eight gear shifting gears and eight gear shifting gears can follow eight axial slip, eight gears through eight gear shifting gears along its axial slip with seven epaxial synchronous rotation be equipped with seven gears mesh come into gear and transmission connection seven, seven transmission connection cutter axles.

3. The gear transmission structure of the gearbox of the mini-tiller according to claim 2, characterized in that: the four-shaft large gear and the four-shaft small gear are arranged adjacently in the axial direction, and the axial length of the three-shaft duplicate gear is smaller than the axial distance between the four-shaft large gear and the four-shaft small gear; in the axial direction, the three-shaft duplex pinion and the four-shaft gearwheel correspond to the same end, the three-shaft duplex gearwheel and the four-shaft pinion correspond to the same end, the five-shaft duplex gearwheel consists of a five-shaft duplex pinion and a five-shaft duplex gearwheel, the five-shaft duplex pinion is meshed with the four-shaft pinion, and the five-shaft duplex gearwheel is positioned at one end of the four-shaft pinion, which is far away from the four-shaft gearwheel.

4. The gear transmission structure of the gearbox of the mini-tiller according to claim 3, characterized in that: the four-axis transmission pinion is positioned at one end of the four-axis bull gear, which is far away from the four-axis pinion, and the five-axis chain wheel is positioned on the five axis and corresponds to the position between the four-axis bull gear and the four-axis pinion.

5. The gear transmission structure of the gearbox of the mini-tiller according to claim 4, characterized in that: the eight-shaft transmission gear is arranged on the eight shafts and corresponds to the position between the four-shaft large gear and the four-shaft small transmission gear; the eight-shaft shift gear is located at an end of the eight-shaft transfer gear that faces away from the four-shaft transfer pinion.

6. The gear transmission structure of the gearbox of the mini-tiller according to claim 5, characterized in that: the seven shafts are meshed with nine shafts of gears which are synchronously and rotatably arranged on the nine shafts through seven shafts of gears to be in transmission connection with the nine shafts, the nine shafts are meshed with ten shafts of gears which are synchronously and rotatably arranged on the ten shafts through nine shafts of gears to be in transmission connection with the ten shafts, and the ten shafts are also synchronously and rotatably provided with ten shaft chain wheels and are in transmission connection with the cutter shaft through ten shaft chain wheels and chains.

7. The gear transmission structure of the gearbox of the mini-tiller according to claim 2, characterized in that: the three-shaft duplicate gear is correspondingly connected on three shafts through splines so as to realize synchronous rotation and axial sliding; eight shift gears are correspondingly connected to eight shafts through splines so as to realize synchronous rotation and axial sliding.

8. The gear transmission structure of the gearbox of the mini-tiller according to claim 6, characterized in that: the traveling shaft is synchronously provided with a traveling chain wheel in a rotating way, and the five-shaft chain wheel is connected with the traveling chain wheel through chain transmission; the cutter shaft is synchronously provided with a cutter chain wheel in a rotating way, and the ten-shaft chain wheel is connected with the cutter chain wheel through chain transmission.